/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchyController.h
Changes the element's index within its default parent (or the top level)
Returns true if the element has been reordered accordingly
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=URigHierarchyController) bool ReorderElement ( [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InElement, int32 InIndex, bool bSetupUndo, bool bPrintPythonCommand )